Improvement in rotary pumps



E. PERRY. 4Ima/atm PUMP.

menzed Sept.4 30,--18-62:

C??? iwi d y lUNITED .STATES .-PATENT.- '-Qsricn."

L'I PERRY', or BALDWINSVILLE, NEW YORK; Assiettes- 'io HIMsELn lhun JOHN Boiler, 'or sAMu'BLAon .lMPnovEMeuT iN RoTARYeUMPs-.e

Spccilicntion forming part of Letters lutcht No. 36,588, dated September 30,-1862. A

To all z vhor e 'it may concern.- i

- Beit kuowmhat 1, ELIPERRY, of Bamwins ville,- in the county of Onondaga and Stute of New York, have invented a new and useful Improvement in Centrifugal Pumps; and I do i hereby declare that the following isa full and vexact descriptionthereof, reference being-had to the accompanying drawings, 'making part of this spccication.

Figure lis ,a :vertical section ofthe case inthe red line,

"closing the pgton, in the plane indicated by and showing the actuating l parts in elevation; Fig. 2,' aplan of the case;

Fig. 3,' a plan of the inner side of theA upper half of the ca se,. together with the piston.

Like letters designate 'corresponding parts l in all-the figures.'

posed of an upper and lower hei-A and B, which are counterparts, fitting together and secnredby means of bolts passing through tlie l angesc a, with packing between, in the usual manner. The shape of the case isv eccentric, and it is provided at the proper'p'osition with -e circulan spiral water-discharge passage, D, commencing at a point at the abutment YZi {wherethc piston touches) and gradually increasing in diameter around the central circle till at the eduction-outletG the eccen tricity is equal tothe diameter oi the passage at that point. The central portion of the case,

or that portion vin'whicii Vthe piston terne, is made dxshing, as represented at c 'ci Thepisto'n is composed cfa` centerhaving radiating wings E E E, curved longitudinally in the direction opposite their motion, so as to present a convex outline on theacting side.

and concave in cross-section on the saine" side,

' as represented et d. This cncavity exte nds the whole length, and is sufficient vto correspond nearly with the' circularity ofthe dis charge-passage D. Any desired number ci wings may be nsed,-three only being repre 'sented in the drawings. Their length is such ss to just reach .to the 'abutment b and to the radius oi' the central circnlardishing portion, c, of the caso, betwcejn,. thc opposite sides of which they closelyjhut easilyA iit,`so that but very little escape is allowed varound them On top of the piston is situated a central cir;-

cular imluction-feeder, G, of' suitable'size and height for the purpose designed, extending upward through an'openingrin' the upper hall of the case, and provided with as manyopen lmouths or passages k 7c it as there, are lwings in the piston'. These passages are inclosed at the side and top, the covering of the latter inclining from the forward edge downwardas it ex# tends backward, in such a manner as to draw anddircct the water into the case as the feeder is revolved, as represented most clearly in Fig. 1. The piston and "feeder-are actuated 'by a-shaft, H, Whose lower bearing, f, rests in a suitable step in the center of the closed lower half, B, of the oase, and which extends upward to thetop of thevwell' and'is connected with `suitable gearing, that represented in the drawj ings being a pinion,K,on'its end, meshing with acog-wheel, L, driven by awinch, M, the Whoie being supported' byu. suitable frame, N. The,

pump'th usarranged is worked below the sur# face of the liquid that it'r'aises. The rapid motion of the piston throwsfthe water' in the case outward into the spiral discharge-passage D, where, by the centrifugal action, it passes around to theeduction-pipe; The peculiar shape of the wings is best adapted ,to the purpose, as the friction or resistance of the water thereon is reduced to the minimum degree.. The concevity transversely gives a roundness or circularity to the body impelled into the discharge-passage, correspondingin form with the same, andthe radiallycurved shape,while giving a tendency to throw the water' outward more readily into the passage, ailows it toes cape much more easily than if the wings were plane and straight, In addition to this centrifugal action, therapid motion of the'i'e'eder G is constantly forcing thewater downward,

'thus-keeping a continual 'and unvarying pressure within the case, and assisting-the raising ofthe liquid. The )induction-passages k k of thel feeder open .at the bottom, respectively, directly into the angles formed at tlie base of the ,adjacentwings, and in such a. direction that the current is not turned acutelv and v 2 i en ,ese

Y suddenly bythe ccntect, but by a reguar and easy deflection, 'nndyso' as to receive the best irnpelling` action from the sedwings with the" eest amou'nt of friction. By being' carried around by the feeder while entering*theease A the liquid also receives the initi'atory motion necessary toits easy and-forcible discharge intgthe exitpassage By the combined eet-ien of thegieeder and piston theweter isthus raised inthe simplestand mest 'ei'ective manper, withlthe smallest-amount of friction and with tHe least expenditure of powa-.compatible with the result produced. Thefeeder by Being situated in -the topof the case (the bottom being entirely closed) draws the liquid in only from above and not from below, as usual.

This prevents in a greatdegree the intreduc--V tio'nto the case et' dirt, sand, er other substance that is linbe to be drawn in from the loottomlx The arrangement is pnrticnleriy apniienbietousejin breweries, where the sediment forms thickly, in the bottoms ef, the

f;anks,' and which would choke any pumpl with zheginduction at the' base. I have applied the dev-ice .tothis nse,iend find it topertectl'y answer the. purpose. The general construction, also, issuch w toinsure the best result when applied to this use, there are no valves or other parte to becom easily obstructed. As the feeder is revolved rapidly, the liquid entering the indnction'fpassage has a tendency I to raise the sa'me, thus couuterbaiancing to a certain degree the Weight oftheshft H and 'decreasing the friction on, thehearing f.

I do not claim seperately either the piston or feeder-, vl) nt What I clamns n'iy invention, and dese4 to secure by Letters Patent, is`

The eombinntion, with the spiral'dschargepassage D, ef the pistonprovided with curved concave wings E E and the feeder G, the Whole arranged and operating substantially es and for the purposes herein set forth;

In witness whereof l have hereunto signed -my nenne in the 4presence-'of two subscribing 

